393147197 has 2 divisors, whose sum is σ = 393147198. Its totient is φ = 393147196.

The previous prime is 393147173. The next prime is 393147241. The reversal of 393147197 is 791741393.

It is an a-pointer prime, because the next prime (393147241) can be obtained adding 393147197 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255648121 + 137499076 = 15989^2 + 11726^2 .

It is a cyclic number.

It is not a de Polignac number, because 393147197 - 2⁶ = 393147133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393147127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196573598 + 196573599.

It is an arithmetic number, because the mean of its divisors is an integer number (196573599).

Almost surely, 2^393147197 is an apocalyptic number.

It is an amenable number.

393147197 is a deficient number, since it is larger than the sum of its proper divisors (1).

393147197 is an equidigital number, since it uses as much as digits as its factorization.

393147197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 44.

The square root of 393147197 is about 19827.9398072518. The cubic root of 393147197 is about 732.5743828295.

The spelling of 393147197 in words is "three hundred ninety-three million, one hundred forty-seven thousand, one hundred ninety-seven".